From 407c53f97c061bfd8a53beacd88af4c786f9e9ee Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Thu, 18 Nov 2021 17:52:48 -0800
Subject: [PATCH] Have rotation_between_vectors handle identical/similar
 vectors

---
 manimlib/utils/space_ops.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/manimlib/utils/space_ops.py b/manimlib/utils/space_ops.py
index 52044d32..9c5e84d2 100644
--- a/manimlib/utils/space_ops.py
+++ b/manimlib/utils/space_ops.py
@@ -157,6 +157,8 @@ def z_to_vector(vector):
 
 
 def rotation_between_vectors(v1, v2):
+    if np.all(np.isclose(v1, v2)):
+        return np.identity(3)
     return rotation_matrix(
         angle=angle_between_vectors(v1, v2),
         axis=normalize(np.cross(v1, v2))